The chaplet of Saint Joseph rosary is divided into fifteen groups of four beads consisting of one white and three purple/ Blue beads. On the white bead, symbolizes Saint Joseph's purity, announce one of the mysteries of the Rosary, and say two Hail Marys on that bead. On the purple/ Blue bead, symbolizes his saintly piety, say the prayer on each bead in that group, "Praised and blessed be Jesus, Mary and Joseph! "
The Saint Joseph Chaplet Rosary is said as follows:
1st Purple / Blue
Praised and blessed be Jesus, Mary and Joseph!
1st White
The Annunciation (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
2nd White
The Visitation
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
3rd White
The Nativity (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
4th White
The Presentation in the Temple (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
5th White
The Finding of Our Lord in the Temple (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
6th White
The Agony in the Garden (say 2 Hail Marys)
group of 3 Purple /Blue
Praised and blessed be Jesus, Mary and Joseph!
7th White
The Scourging (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
8th White
The Crowing with Thorns (say 2 Hail Marys)
group of 3 Purple /Blue
Praised and blessed be Jesus, Mary and Joseph!
9th White
The Carrying of the Cross (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
10th White
The Crucifixion (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
11th White
The Resurrection (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
12th White
The Ascension (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
13th White
The Descent of the Holy Spirit (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
14th White
The Assumption (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
15th White
The Coronation of the Blessed Virgin (say 2 Hail Marys)
group of 3 Purple/ Blue
Praised and blessed be Jesus, Mary and Joseph!
End the chaplet with the following prayers:
V Pray for us, O holy St. Joseph.:
R That we may be made worthy of the promises of Christ.:
Let us pray:
O God, Who has predestined St. Joseph from all eternity for the service of Thine Eternal Son and His Blessed Mother, and made him worthy to be the spouse of this Blessed Virgin and the foster father of Thy Son; we beseech Thee, through all the services he has rendered to Jesus and Mary on earth, that Thou wouldst make us worthy of his intercession and grant us to enjoy the happiness of his company in heaven. Through Christ our Lord. Amen.
 
Source: RosaryAndChaplets.com